Split Rail Linear Power Supply

The positive supply rail is created from a standard off the shelfcoupled inductor from coilcraft.

Split rail linear power supply.

White vinyl 3 rail diamond fence panel with 3 rails post and cap. The input supply voltage range is suitable for use with lithium ion batteries or from a fixed 3 3 v supply. Power supplies are available at mouser electronics from industry leading manufacturers mouser is an authorized distributor for many power supply manufacturers including artesyn bel power cosel cui inc delta mean well phoenix contact recom tdk lambda traco power vicor xp power more. Splitting a rail using the voltage reference will often mean compromising a bit on the symmetry of the split for example if a 3v3 rail is to be split then the closest would be to use the 1 8v output reference which gives a 1 8 1 5v asymmetrical supply.

For step by step details see the application report creating a split rail power supply with a wide input voltage buck regulator charge pumps are a popular and easy way of inverting positive rails. I build up a simple low voltage supply to setup the framework for the l. Figure 2 is a plot of the input current versus the output current for the circuit in figure 1. Only the ref3318 is available with a 1 8v output so it could be used.

The tps65133 is designed to supply any system requiring 5 0 v supply rails. Open in new find other lcd oled display power drivers description. This results in the load current of both regulators to be equal in magnitude. This document outlines a step by stepmethod for designing the split rail power supply.

Each output can supply up to 250 ma of output current. I thought it would be interesting to do a theory video on linear power supply design.